Even for me, I find his fit too slim. He's got an amazing body that already highlights the broad shoulders and slim waist but his suit is so fitted he looks cartoonish. I'd let out 2 cm on the waist and butt and think it'll look fine.

They are WAAAAY too slim, and I'm a guy who likes to wear everything slim. That's the type of fit that a cartoon character would have. Still, for comically slim suits, they don't look as tight as I'd expect. It looks more like they're comically slim by design.

What about tailoring/fit techniques to get a suit as slim as possible but still allow movement?

For example I noticed if I have my shirt sleeves or jacket sleeves too slim it hurts to bend my arm all the way. Yet I will endure some discomfort for a good fit and since I usually don't bend my arms 100% of the way up anyway in day-to-day activities.

What about tailoring/fit techniques to get a suit as slim as possible but still allow movement?
For example I noticed if I have my shirt sleeves or jacket sleeves too slim it hurts to bend my arm all the way. Yet I will endure some discomfort for a good fit and since I usually don't bend my arms 100% of the way up anyway in day-to-day activities.

A good fit will not give you any discomfort. Something that is too tight will.

They are WAAAAY too slim, and I'm a guy who likes to wear everything slim. That's the type of fit that a cartoon character would have. Still, for comically slim suits, they don't look as tight as I'd expect. It looks more like they're comically slim by design.

And he's a comically slim guy. The clothes are built around his frame- yes, they're obviously cut very close, but I've seen suits posted here that were cut similarly close to someone's body, it's just that the body wasn't such a radical body type.

Yes, it's still an extreme look, but that's much more the body than the suit, IMO. Any suit made to actually fit his frame would have to have a similar radio of the chest and shoulders to the waist.

And he's a comically slim guy. The clothes are built around his frame- yes, they're obviously cut very close, but I've seen suits posted here that were cut similarly close to someone's body, it's just that the body wasn't such a radical body type.
Yes, it's still an extreme look, but that's much more the body than the suit, IMO. Any suit made to actually fit his frame would have to have a similar radio of the chest and shoulders to the waist.

I'd say that if his body type is that extreme then he shouldn't be wearing suits cut that close. In a classical sense a suit is supposed to accentuate your strengths and minimize your flaws. If his body is really extremely angular then a suit should try to soften that and make him look more balanced. I don't look good in certain fits that do other people quite well. Accordingly I avoid those.

I'd say that if his body type is that extreme then he shouldn't be wearing suits cut that close. In a classical sense a suit is supposed to accentuate your strengths and minimize your flaws. If his body is really extremely angular then a suit should try to soften that and make him look more balanced. I don't look good in certain fits that do other people quite well. Accordingly I avoid those.

So having a suit that shows off his incredibly athletic physique isn't emphasizing his strengths? You want the fit to try and make him look closer to average, but that wouldn't, by any sense of the imagination, be minimizing his flaws, that would be making him look less fit than he is. Which would fall under the "making him look more flawed than he is" heading, a situation anyone should want to avoid.

He doesn't have an average body. His is better than the average body, why would he want to hide that? I know why so many here would like him to hide it, he's making them look bad.

So having a suit that shows off his incredibly athletic physique isn't emphasizing his strengths? You want the fit to try and make him look closer to average, but that wouldn't, by any sense of the imagination, be minimizing his flaws, that would be making him look less fit than he is. Which would fall under the "making him look more flawed than he is" heading, a situation anyone should want to avoid.
He doesn't have an average body. His is better than the average body, why would he want to hide that? I know why so many here would like him to hide it, he's making them look bad.

lol No, I didn't say that. What I'm saying is that if you want me to see every muscle in your spectacularly toned back then wear a skin tight underarmor t shirt. I should not be admiring your lats when you are in a suit. This is a tailor's shop, not a Mr. Universe competition.